When you say...

...strength is health, what do you mean by 'strength'? They ask me.

And since they ask me just that, my answer turns out to be a question:

What is 'health'?

And then we make paper-planes, so that we avoid further questions...

Why health? Why strength?

Are you healthy?

Are you strong?

Are you healthy but not strong?

Are you strong but not healthy?

What do you think?